Ruthenium-Catalysed Enantioselective Hydrogenation of Trisubstituted Enamides Derived from 2-Tetralone and 3-Chromanone: Influence of Substitution on the Amide Arm and the Aromatic Ring
作者:J. L. Renaud、P. Dupau、A.-E. Hay、M. Guingouain、P. H. Dixneuf、C. Bruneau
DOI:10.1002/adsc.200390017
日期:2003.1
Cyclic enamides were prepared in one step from tetralone and chromanone derivatives and primary amides under acidic conditions. The enantioselective hydrogenation of these enamides bearing an endocyclic trisubstituted carbon-carbon double bond was performed at room temperature in the presence of ruthenium catalysts. On the one hand, the nature of the amide group had little influence on the enantioselectivity
在酸性条件下,由四氢萘酮和苯并二氢吡喃酮衍生物和伯酰胺一步制备环状酰胺。这些带有内环三取代碳-碳双键的酰胺的对映选择性氢化是在室温下在钌催化剂的存在下进行的。一方面,当使用单核预催化剂时,酰胺基的性质对氢化的对映选择性几乎没有影响。另一方面,在四氢萘酮和苯并二氢吡喃酮骨架上某些特定位置的配位原子的存在导致对映体过量的急剧减少。